Process cartridge and image forming apparatus including means for detecting mounting of the process cartridge to main body of image forming apparatus, and process cartridge and developer cartridge including positioning portion

An electrophotographic image forming apparatus to which a process cartridge is detachably mountable for forming an image on a recording medium, comprising:

• (a) a process cartridge mounting portion for detachably mounting the process cartridge, the process cartridge including:
• an electrophotographic photosensitive member,
• process means acting on said electrophotographic photosensitive member, and
• a positioning portion of the cartridge having an electrode to be connected to an electrode provided on a positioning portion of the process cartridge mounting portion on a main body of said image forming apparatus and for supplying an electric current from the main body of said image forming apparatus to said process means or for grounding said electrophotographic photosensitive member;
• (b) the positioning portion having the electrode provided on said process cartridge mounting portion and to be connected to the electrode of said positioning portion of the cartridge;
• (c) a high voltage source generating a high-voltage current to be supplied to the electrode connected to the electrode of said positioning portion of the cartridge or a grounding member for grounding the electrode connected to the electrode of said positioning portion of the cartridge;
• and
• (d) conveying means for conveying said recording medium.

An electrophotographic image forming apparatus to which a developer cartridge is detachably mountable for forming an image on a recording medium, comprising:

• (a) a developer cartridge mounting portion for detachably mounting the developer cartridge, the developer cartridge including:
• a developing roller,
• a toner containing portion containing therein a toner to be supplied to said developing roller, and
• a positioning portion of the cartridge having an electrode to be connected to an electrode provided on a positioning portion of the developer cartridge mounting portion on a main body of said image forming apparatus and for applying a developing bias from the main body of the image forming apparatus to said developing roller;
• (b) the positioning portion having the electrode provided on said developer cartridge mounting portion and to be connected to the electrode of said positioning portion of the cartridge;
• (c) a developing bias power source for supplying a developing bias to the electrode connected to said electrode of the cartridge;
• and
• (d) conveying means for conveying said recording medium.

A process cartridge detachably mountable to a main body of an electrophotographic image forming apparatus, said main body having a supporting portion and cartridge detecting means for detecting that said process cartridge is mounted to said main body, said process cartridge comprising:

• an electrophotographic photosensitive drum;
• process means acting on said electrophotographic photosensitive drum;
• a supported portion to be supported by said supporting portion of said main body when said process cartridge is mounted to said main body;
• and
• a detecting action portion provided on said supported portion for operating said cartridge detecting means when said process cartridge is mounted in a mounting position in said main body.

A process cartridge detachably mountable to a main body of an electrophotographic image forming apparatus for forming an image on a recording medium, said main body including:

• (a) a process cartridge mounting portion for detachably mounting said process cartridge;
• (b) a positioning portion having an electrode provided on said process cartridge mounting portion and to be connected to an electrode of a positioning portion of the cartridge;
• (c) a high voltage source generating a high-voltage current to be supplied to the electrode connected to the electrode of said positioning portion of the cartridge or a grounding member for grounding the electrode connected to the electrode of said positioning portion of the cartridge;
• and (d) conveying means for conveying said recording medium, said process cartridge comprising:
• an electrophotographic photosensitive member, photosensitive member,
• process means acting on said electrophotographic photosensitive member;
• and
• said positioning portion of the cartridge having the electrode to be connected to the electrode provided on said positioning portion of said process cartridge mounting portion on the main body of said image forming apparatus and for supplying an electric current from the main body of said image forming apparatus to said process means or for grounding said electrophotographic photosensitive member.

A developer cartridge detachably mountable to a main body of an electrophotographic image forming apparatus for forming an image on a recording medium, said main body including:

• (a) a developer cartridge mounting portion for detachably mounting said developer cartridge, (b) a positioning portion having an electrode provided on said developer cartridge mounting portion and to be connected to an electrode of a positioning portion of the cartridge;
• (c) a developing bias power source for supplying a developing bias to the electrode connected to said electrode of the cartridge;
• and (d) conveying means for conveying said recording medium, said developer cartridge comprising:
• a developing roller;
• a toner containing portion containing therein a toner to be supplied to said developing roller;
• and
• said positioning portion of the cartridge having said electrode to be connected to said electrode provided on said positioning portion of said developer cartridge mounting portion on said main body of said image forming apparatus and for applying the developing bias from the main body of the image forming apparatus to said developing roller.